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| author | Qian Cai <cai@lca.pw> | 2020-09-10 08:26:15 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-09-10 08:26:15 -0700 |
| commit | a805c111650cdba6ee880f528abdd03c1af82089 (patch) | |
| tree | fc7db90d60dccf7c13ec19455ec2fb0cc4031207 /ipc | |
| parent | f4d51dffc6c01a9e94650d95ce0104964f8ae822 (diff) | |
| download | linux-a805c111650cdba6ee880f528abdd03c1af82089.tar.bz2 | |
iomap: fix WARN_ON_ONCE() from unprivileged users
It is trivial to trigger a WARN_ON_ONCE(1) in iomap_dio_actor() by
unprivileged users which would taint the kernel, or worse - panic if
panic_on_warn or panic_on_taint is set. Hence, just convert it to
pr_warn_ratelimited() to let users know their workloads are racing.
Thank Dave Chinner for the initial analysis of the racing reproducers.
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions